Method for monitoring, transmitting, and receiving downlink pre-emption indication information in new radio networks and apparatus thereof

ABSTRACT

Provided is a method for monitoring, transmitting, and receiving downlink pre-emption indication information in a next-generation/5G radio access network. The method may include receiving monitoring configuration information for downlink pre-emption indication information from a base station; receiving configuration information on a control resource set (CORESET) for receiving the downlink pre-emption indication information from the base station; configuring reference downlink resources based on the configuration information on a control resource set; and monitoring the downlink pre-emption indication information for the reference downlink resources, wherein the downlink pre-emption indication information includes a bitmap indicating information on at least one of time-section resources and frequency-section resources in which pre-emption has occurred, among reference downlink resources.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application Nos.10-2017-0033297, 10-2017-0082920, 10-2017-0101782, 10-2017-0035615,10-2017-0101169 & 10-2018-0018656 filed on Mar. 16, 2017, Jun. 29, 2017,Aug. 10, 2017, Mar. 21, 2017, Aug. 9, 2017 & Feb. 14, 2018, which arehereby incorporated by reference for all purposes as if fully set forthherein.

BACKGROUND OF THE INVENTION 1. Field of the invention

The present embodiments relate to a method for monitoring, transmitting,and receiving downlink pre-emption indication information in anext-generation/5G radio access network {hereinafter, also referred toas “NR (New Radio)”}.

2. Description of the Prior Art

Recently, 3rd generation partnership project (3GPP) has approved thestudy item “Study on New Radio Access Technology” for studyingnext-generation/5G radio access technology. Based on the same, 3GPP hasdiscussed a frame structure, channel coding and modulation, waveform andmultiple access schemes, and the like for NR (New Radio) in radio accessnetwork working group 1 (RAN WG1). It is required to design the NR tosatisfy various requirements for respective segmented and specifiedusage scenarios, as well as an improved data transmission rate incomparison with long term evolution (LTE)/LTE-Advanced.

Enhanced Mobile BroadBand (eMBB), massive Machine Type Communication(mMTC), and Ultra Reliable and Low Latency Communication (URLLC) havebeen proposed as typical usage scenarios for the NR, and flexible framestructure design is required, compared to LTE/LTE-Advanced, to meet therequirements of the respective scenarios.

In particular, services, such as eMBB and mMTC in the NR, are moreefficient as time-section resource assignment is lengthened in terms ofcell throughput and coverage, while a service of URLLC is more efficientas time-section resource assignment is shortened because of a latencyproblem. Therefore, it is necessary to support efficient multiplexingfor data traffic between the respective services in a network in whichthe eMBB, mMTC, and URLLC services are mixed.

SUMMARY OF THE INVENTION

An aspect of the present embodiments is to provide a specific method forsupporting efficient multiplexing for data traffic between respectiveservices in a network that simultaneously provide various serviceshaving different QoS requirements, such as eMBB, mMTC, and URLLCservices in the NR.

An embodiment, which has been made in order to solve the above problem,provides a method for receiving downlink pre-emption indicationinformation by a user equipment, the method including: receivingmonitoring configuration information for downlink pre-emption indicationinformation from a base station; receiving configuration information ona control resource set (CORESET) for receiving the downlink pre-emptionindication information from the base station; configuring referencedownlink resources based on the configuration information on a controlresource set; and monitoring the downlink pre-emption indicationinformation for the reference downlink resources, wherein the downlinkpre-emption indication information includes a bitmap indicatinginformation on time-section resources or frequency-section resources inwhich pre-emption has occurred, among reference downlink resources.

Another embodiment provides a method for transmitting downlinkpre-emption indication information by a base station, the methodincluding: configuring monitoring configuration information for downlinkpre-emption indication information; transmitting, to a user equipment,configuration information on a control resource set (CORESET) fortransmitting the downlink pre-emption indication information; andtransmitting, to the user equipment, the downlink pre-emption indicationinformation for reference downlink resources, wherein the downlinkpre-emption indication information includes a bitmap indicatinginformation on time-section resources or frequency-section resources inwhich pre-emption has occurred, among reference downlink resources.

Another embodiment provides a user equipment for receiving downlinkpre-emption indication information, the user equipment including: areceiver configured to receive monitoring configuration information fordownlink pre-emption indication information from a base station, andconfigured to receive configuration information on a control resourceset (CORESET) for receiving the downlink pre-emption indicationinformation from the base station; and a controller configured toconfigure reference downlink resources based on the configurationinformation on the control resource set, and configured to monitor thedownlink pre-emption indication information for the reference downlinkresources, wherein the downlink pre-emption indication informationincludes a bitmap indicating information on time-section resources orfrequency-section resources in which pre-emption has occurred, amongreference downlink resources.

Another embodiment provides a base station for transmitting downlinkpre-emption indication information, the base station including: acontroller configured to configure monitoring configuration informationfor downlink pre-emption indication information; and a transmitterconfigured to transmit, to a user equipment, configuration informationon a control resource set (CORESET) for transmitting the downlinkpre-emption indication information, and configured to transmit, to theuser equipment, the downlink pre-emption indication information for thereference downlink resources, wherein the downlink pre-emptionindication information includes a bitmap indicating information ontime-section resources or frequency-section resources in whichpre-emption has occurred, among reference downlink resources.

According to the present embodiments, it is possible to provide aspecific method for supporting efficient multiplexing for data trafficbetween the respective services in a network where services havingdifferent QoS requirements, such as eMBB, mMTC, and URLLC services, aremixed in the NR.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating OFDM symbol alignment in case of usingdifferent subcarrier spacing according to at least one of embodiments;

FIG. 2 is a diagram illustrating a resource when a single pre-emptionoccurs between eMBB and URLLC in the downlink according to at least oneof embodiments;

FIG. 3 is a diagram illustrating resources when multiple pre-emptionoccurs between eMBB and URLLC in the downlink according to at least oneof embodiments;

FIG. 4 is a diagram illustrating control resource sets (CORESETs) fortransmitting pre-emption indication information and pre-emption regionscorresponding to the control resource sets according to at least one ofembodiments;

FIG. 5 is a flowchart illustrating a procedure of a user equipment forreceiving downlink pre-emption indication information according to atleast one of embodiments;

FIG. 6 is a flowchart illustrating a procedure of a base station fortransmitting downlink pre-emption indication information according to atleast one of embodiments;

FIG. 7 is a block diagram illustrating a base station according to atleast one of embodiments; and

FIG. 8 is a block diagram illustrating a user equipment according to atleast one of embodiments.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the accompanying drawings. In adding referencenumerals to elements in each drawing, the same elements will bedesignated by the same reference numerals, if possible, although theyare shown in different drawings. Further, in the following descriptionof the present disclosure, a detailed description of known functions andconfigurations incorporated herein will be omitted when it is determinedthat the description may make the subject matter of the presentdisclosure rather unclear.

As used herein, a wireless communication system may be a system forproviding various communication services such as a voice service and apacket data service. The wireless communication system may include aUser Equipment (UE) and a Base Station (BS or an eNB).

The user equipment may be a comprehensive concept that indicates aterminal for use in wireless communication, including a UE (UserEquipment) in wideband code division multiple access (WCDMA), LTE, highspeed packet access (HSPA), international mobile telecommunication(IMT)-2020 (5G or New Radio), and the like, and a MS (Mobile station), aUT (User Terminal), an SS (Subscriber Station), a wireless device, andthe like in global systems for mobile communication (GSM).

A base station or a cell may generally refer to a station wherecommunication with a User Equipment (UE) is performed. Such a basestation or a cell means, inclusively, all of various coverage areas suchas a Node-B, an evolved Node-B (eNB), gNode-B (gNB), Low Power Node(LPN), a Sector, a Site, various types of antennas, a Base TransceiverSystem (BTS), an Access Point, a Point (e.g., transmitting point,receiving point, or tranceiving point), a Relay Node, a Mega Cell, aMacro Cell, a Micro Cell, a Pico Cell, a Femto Cell, a Remote Radio Head(RRH), a Radio Unit (RU), and a Small Cell.

Each of the cells has a base station that controls a corresponding cell.Thus, the base station may be construed in two ways. 1) the base stationmay be a device itself that provides a megacell, a macrocell, amicrocell, a picocell, a femtocell, and a small cell in association witha wireless area, or 2) the base station may indicate a wireless areaitself In 1), all devices that interact with one another to enable thedevices that provide a predetermined wireless area to be controlled byan identical entity or to cooperatively configure the wireless area, maybe indicated as a base station. Based on a configuration type of awireless area, a point, a transmission/reception point, a transmissionpoint, a reception point, or the like may be an embodiment of a basestation. In ii), a wireless area itself that receives or transmits asignal from a perspective of a terminal or a neighbouring base station,may be indicated as a base station.

In the present specification, a cell may refer to the coverage of asignal transmitted from a transmission/reception point, a componentcarrier having the coverage of the signal transmitted from thetransmission/reception point (transmission point ortransmission/reception point), or the transmission/reception pointitself.

In the specification, the user equipment and the base station are usedas two (uplink or downlink) inclusive transceiving subjects to embodythe technology and technical concepts described in the specifications.However, the UE and the base station may not be limited to apredetermined term or word.

Here, Uplink (UL) refers to a scheme for a UE to transmit and receivedata to/from a base station, and Downlink (DL) refers to a scheme for abase station to transmit and receive data to/from a UE.

Uplink transmission and downlink transmission may be performed using aTDD (Time Division Duplex) scheme that performs transmission based ondifferent times. Uplink transmission and downlink transmission may alsobe performed using an FDD (Frequency Division Duplex) scheme thatperforms transmission based on different frequencies or a mixed schemeof the TDD and FDD schemes.

Further, in a wireless communication system, a standard may be developedby configuring an uplink and a downlink based on a single carrier or apair of carriers.

The uplink and the downlink may transmit control information through acontrol channel, such as a PDCCH (Physical Downlink Control CHannel),PUCCH (Physical Uplink Control CHannel), and the like, and may beconfigured as a data channel, such as PDSCH (Physical Downlink SharedCHannel), PUSCH (Physical Uplink Shared CHannel), and the like, totransmit data.

A downlink may refer to communication or a communication path from amulti-transmission/reception point to a terminal, and an uplink mayrefer to communication or a communication path from a terminal to amulti-transmission/reception point. In a downlink, a transmitter may bea part of a multiple transmission/reception point and a receiver may bea part of a terminal. In an uplink, a transmitter may be a part of aterminal and a receiver may be a part of a multipletransmission/reception point.

Hereinafter, a situation, in which signals are transmitted and receivedthrough a channel such as a PUCCH, a PUSCH, a PDCCH, or a PDSCH, will beexpressed as the transmission and reception of a PUCCH, a PUSCH, aPDCCH, or a PDSCH.

Meanwhile, higher layer signalling includes an RRC signalling thattransmits RRC information including an RRC parameter.

A base station performs downlink transmission to terminals. A basestation may transmit a physical downlink control channel fortransmitting downlink control information such as scheduling required toreceive a downlink data channel that is a main physical channel forunicast transmission, and scheduling approval information fortransmission on an uplink data channel. Hereinafter, transmission andreception of a signal through each channel will be described astransmission and reception of a corresponding channel.

Varied multiple access schemes may be unrestrictedly applied to thewireless communication system. Various multiple access schemes, such asTDMA (Time Division Multiple Access), FDMA (Frequency Division MultipleAccess), CDMA (Code Division Multiple Access), OFDMA (OrthogonalFrequency Division Multiple Access), NOMA (Non-Orthogonal MultipleAccess), OFDM-TDMA, OFDM-FDMA, OFDM-CDMA, and the like may be used.Here, NOMA includes SCMA (Sparse Code Multiple Access), LDS (Low CostSpreading), and the like.

An embodiment of the present disclosure may be applicable to resourceallocation in an asynchronous wireless communication scheme that evolvesinto LTE/LTE-advanced and IMT-2020 through GSM, WCDMA, and HSPA, and maybe applicable to resource allocation in a synchronous wirelesscommunication scheme that evolves into CDMA, CDMA-2000, and UMB.

In the present specifications, a machine type communication (MTC)terminal refers to a terminal that is low cost (or is not verycomplexity), a terminal that supports coverage enhancement, or the like.Alternatively, in the present specifications, the MTC terminal refers toa terminal that is defined as a predetermined category for maintaininglow costs (or low complexity) and/or coverage enhancement.

In other words, in the present specifications, the MTC terminal mayrefer to a newly defined 3GPP Release 13 low cost (or low complexity) UEcategory/type, which executes LTE-based MTC related operations.Alternatively, in the present specifications, the MTC terminal may referto a UE category/type that is defined in or before 3GPP Release-12 thatsupports the enhanced coverage in comparison with the existing LTEcoverage, or supports low power consumption, or may refer to a newlydefined Release 13 low cost(or low complexity) UE category/type.Alternatively, the MTC terminal may refer to a further Enhanced MTCterminal defined in Release-14.

In the present specification, a NarrowBand-Internet of Things (NB-IoT)user equipment represents a user equipment supporting radio access forthe cellular IoT. The objectives of NB-IoT technology include improvedindoor coverage, support for large-scale and low-speed user equipments,low-latency sensitivity, low-cost user equipments, low powerconsumption, and optimized network architecture.

Enhanced Mobile Broadband (eMBB), massive Machine Type Communication(mMTC), and Ultra Reliable and Low Latency Communication (URLLC) havebeen proposed as typical usage scenarios in NR (New Radio). Thus, theyare under discussion in 3GPP.

In the present specification, a frequency, a frame, a subframe, aresource, a resource block, a region, a band, a subband, a controlchannel, a data channel, a synchronization signal, various referencesignals, various signals, and various messages in relation to NR (NewRadio) may be interpreted according to various meanings, which have beenused in the past, are being used presently, or will be used in thefuture.

NR (New Radio)

Recently, 3GPP has approved the study item “Study on New Radio AccessTechnology” for research on next-generation/5G radio access technology,and has started discussions on a frame structure, channel coding andmodulation, waveform and multiple access schemes, and the like for NR(New Radio) based on the same.

It is required to design the NR to satisfy various requirements for eachsegmented and specified usage scenario, as well as an improved datatransmission rate in comparison with LTE/LTE-Advanced. In particular,Enhanced Mobile BroadBand (eMBB), massive Machine-Type Communication(mMTC), and Ultra Reliable and Low Latency Communication (URLLC) havebeen proposed as typical usage scenarios of the NR, and flexible framestructure design is required, compared to LTE/LTE-Advanced, in order tomeet the requirements of the respective scenarios.

More specifically, eMBB, mMTC, and URLLC are under consideration astypical usage scenarios of the NR, which are under discussion in 3GPP.The respective usage scenarios have different requirements for datarates, latency, coverage, or the like. Thus, in order to efficientlysatisfy the requirements for each usage scenario through a frequencyband constituting an NR system, there is a need for a method ofefficiently multiplexing radio resource units based on differentnumerologies (e.g., subcarrier spacing, subframes, TTIs, or the like).

To this end, there have been discussions on a method of multiplexing andsupporting numerologies having different subcarrier spacing (SCS)values, based on TDM, FDM, or TDM/FDM, through a single NR carrier and amethod of supporting one or more time units when a scheduling unit isconfigured in a time domain. In this regard, in the NR, a subframe hasbeen defined as one of time-domain structures, and there was a decisionto define, as a reference numerology for defining corresponding subframeduration, a single subframe duration including 14 OFDM symbols of normalCP overhead based on 15 kHz subcarrier spacing (SCS), which is the sameas LTE. According to this, the subframe in the NR has a time duration of1 ms. However, unlike the LTE, a slot and a mini-slot may be defined asa time unit, which is the basis of actual uplink/downlink datascheduling, for the absolute reference time duration in the subframe ofthe NR. In this case, the number of OFDM symbols (a y-value)constituting the corresponding slot has been determined to have a valueof y=14 irrespective of the numerology.

Accordingly, any slot may include 14 symbols. All of the symbols may beused for downlink (DL) transmission, all of the symbols may be used foruplink (UL) transmission, or the symbols may be used in the form of a DLportion+a gap+a UL portion depending on the transmission direction ofthe corresponding slot.

In addition, a mini-slot including fewer symbols than a correspondingslot may be defined in a numerology (or SCS) and, based on this, a shorttime-domain scheduling interval may be configured for uplink/downlinkdata transmission/reception, or a long time-domain scheduling intervalmay be configured through slot aggregation for uplink/downlink datatransmission/reception.

In particular, in the case of transmission and reception oflatency-critical data such as URLLC, when the scheduling is performed ina slot unit of 0.5 ms (7 symbols) or 1 ms (14 symbols), defined in aframe structure based on a numerology having a small SCS value, such as15 kHz, it may be difficult to satisfy the latency requirements.Therefore, a mini-slot including fewer OFDM symbols than thecorresponding slot may be defined, thereby enabling the scheduling forlatency-critical data, such as the URLLC, based on the same.

Alternatively, a method is also under consideration for supportingnumerologies having different SCS values by multiplexing the same usinga TDM scheme or an FDM scheme in a single NR carrier as described above,thereby scheduling data to conform to the latency requirements based ona slot (mini-slot) length defined for each numerology. For example, inthe case where the SCS is 60 kHz as shown in FIG. 1, the symbol lengththereof is reduced to about ¼ of the symbol length for the SCS of 15kHz. Therefore, when a single slot includes 7 OFDM symbols, the 15kHz-based slot is 0.5 ms long, while the 60 kHz-based slot length isreduced to about 0.125 ms.

That is, in the NR, there is discussion on a method for satisfying therespective requirements of URLLC and eMBB by defining different SCS ordifferent TTIs.

As described above, there is a discussion on a method for supportingscheduling units having different lengths in a time domain to satisfyvarious usage scenarios in the NR. In particular, to satisfy the URLLCrequirements, it is necessary to subdivide the scheduling unit in thetime domain. However, excessively subdivided time-domain schedulingunits are not desirable in terms of cell throughput for the eMBB becausethey involve excessive control overhead. In addition, a longertime-section resource assignment structure may be more suitable forcoverage enhancement in terms of the mMTC.

In accordance with at least one embodiment, an effective downlink datachannel resource assignment method may be provided for supportingefficient multiplexing between data traffic of each service in a networkwhere services, which is efficiently used with long time-sectionresource assignment, such as eMBB and mMTC, and services requiring shorttime-section resource assignment, such as URLLC, are mixed.

The embodiments described below may be applied to user equipments, basestations, and core network entities (MME) using any mobile communicationtechnologies. For example, the embodiment may be applied tonext-generation mobile communication (5G mobile communication orNew-RAT) user equipments, base stations, and core network entities{Access and Mobility function (AMF)}, as well as mobile communicationuser equipments adopting LTE technology. Hereinafter, for theconvenience of description, a base station may represent an eNB of anLTE/E-UTRAN or a base station {a CU (Central Unit), a DU (DistributedUnit), or a single logical entity implemented by a CU and a DU} or a gNBin a 5G wireless network in which the CU and the DU are separated.

In the usage scenario of the NR, the URLLC refers to a service forsupporting high reliability and low latency, which is used in the casewhere the delay of data transmission/reception causes a serious problemeven though a small amount of data is transmitted/received. For example,the URLLC service may be used for an autonomous vehicle, wherein if thedelay of data transmission/reception increases, human and materialdamages due to traffic accidents may occur.

The eMBB is a service that is used when a large amount of data isrequired to be transmitted/received using a service supportinghigh-speed data transmission. For example, when a large amount of dataneeds to be transmitted per unit time, such as in the case of a 3D videoor UHD service, the eMBB service may be used.

The mMTC is a service that is used when low power consumption isrequired while a small amount of data is transmitted/received and delaydoes not cause a problem. For example, the mMTC service may be used forsensor devices provided to build a smart to city because a batterymounted in the sensor device must be operated for as long a time aspossible.

In general, one of the three services (i.e., the URLLC, the eMBB, andthe mMTC) described above may be provided to a user equipment accordingto the characteristics thereof. Hereinafter, a user equipment using theURLLC service may be referred to as an URLLC user equipment, a userequipment using the eMBB service may be referred to as an eMBB userequipment, and a user equipment using the mMTC service may be referredto as an mMTC user equipment. In addition, the eMBB, the mMTC, and theURLLC may also be interpreted as an eMBB user equipment, an mMTC userequipment, and an URLLC user equipment, respectively.

In the specification, the term “pre-emption” means re-assignment of someof the resources, which have been assigned to the eMBB or the mMTC, tothe URLLC in order to satisfy the latency requirements for the URLLCwhen traffic occurs in the URLLC. Such a term “pre-emption” may also beexpressed using the term “puncturing” or “superposition” as will bedescribed in the embodiments below (however, the present disclosure isnot limited to specific terms). When pre-emption occurs, downlink datatransmission to the eMBB user equipment is discontinuously interruptedin the middle of transmission in order to perform downlink datatransmission to the URLLC user equipment. Therefore, in the embodiment,the occurrence of pre-emption may be interpreted to mean thatdiscontinuous transmission occurs in the eMBB user equipment, and theoccurrence of pre-emption may be expressed as the occurrence ofdiscontinuous transmission.

At this time, since the resources, which have already been assigned tothe eMBB or the mMTC, are used for the URLLC, the eMBB user equipment orthe mMTC user equipment having resources assigned thereto is required toreceive information on the resources to be pre-empted. Downlinkpre-emption refers to the pre-emption of downlink resources of the userequipment.

The downlink pre-emption indication information is intended to indicateto the user equipment the data channel that is pre-empted in thedownlink, and the downlink pre-emption indication information may bereferred to as downlink pre-emption notification information because itinforms the user equipment of the downlink pre-emption. The downlinkpre-emption indication information may be indicated in the form of asignal or a channel.

Hereinafter, various embodiments of a method, in which a user equipmentand a base station monitor and transmit/receive downlink pre-emptionindication information, will be described in more detail.

The embodiments described below may be applied individually or by meansof a combination thereof.

As described above, to support the URLLC service in the NR, it isnecessary to support a short scheduling unit {or Transmission TimeInterval (TTI)} capable of satisfying a latency boundary in the timedomain. On the other hand, in the case of the eMBB or the mMTC, it maybe efficient to apply a slightly longer time-section resource assignmentunit than the usage scenario of the URLLC in terms of control overheadand coverage when defining a scheduling unit in the time domain.

In order to satisfy various usage scenarios of the NR as describedabove, it is necessary to support a mixed numerology structuresupporting a numerology of subcarrier spacing (e.g., larger subcarrierspacing, such as 60 kHz, 120 kHz, or the like), which makes it easy todefine a short time-section resource assignment unit suitable for theURLLC, and a numerology of subcarrier spacing suitable for the eMBB andthe mMTC (e.g., 15 kHz for the eMBB or 3.75 kHz for the mMTC) through asingle NR carrier, or to support time-domain scheduling units havingdifferent lengths, such as subframes, slots, or mini-slots, in an NRcarrier that operates with a single numerology.

One example of a method for this may be defined such that time/frequencyresources (or regions), which are assigned based on an optimalscheduling unit for each usage scenario, are assigned semi-staticallyand resource assignment is performed using time/frequency resources ofthe region corresponding to the usage scenario for each user equipmentaccording thereto.

However, semi-static resource assignment is inefficient in terms ofradio resource utilization in an environment in which traffic israndomly generated for each usage scenario.

In order to solve this problem, when assigning downlink datatransmission resources, it is required to support dynamicpuncturing-based eMBB/URLLC multiplexing in which some of the downlinkradio resources, which have been assigned for eMBB or mMTC datatransmission, are punctured and used for urgent URLLC datatransmission/reception or to support superposition-based eMBB/URLLCmultiplexing in which URLLC data transmission signals are superposedonto some of the radio resources to then be transmitted.

In other words, a method is under consideration, which supports dynamicresource sharing between the eMBB and the URLLC such that some resourcesare punctured (or superposed) from among the eMBB (or mMTC) downlinkresources, which have already been assigned and through whichtransmission is ongoing, and used for urgent URLLC data transmission.

That is, a method is under consideration, in which when downlink data,which is more latency-critical than ongoing PDSCH transmission, whichhas been assigned with resources in a unit of a slot or aggregatedslots, is received from a base station/network, pre-emption of thelatency-critical PDSCH transmission is performed and some resources arepunctured from among the ongoing PDSCH transmission resources to then beassigned for the latency-critical PDSCH transmission.

Additionally, a method is under consideration, in which when a dynamicresource sharing method on a basis of dynamic puncturing (orsuperposition) between the eMBB and the URLLC is applied to NR downlink,a corresponding eMBB user equipment receives an indication on the radioresources punctured for the URLLC data transmission through explicitsignalling.

As the explicit signalling-based indication method, a method ofindicating puncturing information within a TTI (or slot, mini-slot, oraggregated slots) in which downlink data transmission is performed bythe eMBB user equipment and a method of indicating puncturinginformation within a TTI following the corresponding TTI are underconsideration.

In accordance with at least one embodiment, a downlink radio resourceassignment method may be provided for efficiently supporting dynamicresource sharing between the eMBB and the URLLC as described above.

Although the embodiment will be described based on usage scenarios ofthe eMBB, the URLLC, or the like, from viewpoints of radio resourceassignment and downlink data transmission/reception, the eMBB maycorrespond to a user equipment or a data session in which a longtime-section resource assignment unit in a unit of a slot or aggregatedslots is defined, and the URLLC may correspond to a user equipment or adata session in which a short time-section resource assignment unit,such as a mini-slot, symbol, or large SCS (e.g., 60 kHz or 120kHz)-based slot unit, is defined.

More specifically, the embodiment may correspond to a partial radioresource puncturing technique for ongoing downlink transmission, inwhich puncturing (or superposition) is performed in a unit of amini-slot or a symbol from the downlink data transmission resourcesassigned in a unit of a slot or slots or in which only some frequencyresources (some PRBs) are punctured (or superposed) even in thecorresponding mini-slot or symbol.

That is, the present disclosure may be interpreted from viewpoints of amini-slot or symbol-based puncturing method or a puncturing method forsome of the resources assigned for the corresponding downlink datatransmission and explicit signalling therefor.

Accordingly, an eMBB user equipment or eMBB data corresponds to downlinkdata transmission on a basis of a scheduling unit in a slot unit orhaving a long time-section, in which the puncturing can be performedfrom among given downlink data transmission resources, in theembodiment. In addition, a URLLC user equipment or URLLC datacorresponds to downlink data transmission in which some of the downlinkresources, which have been assigned for the eMBB user equipment or eMBBdata transmission, are punctured and used.

Accordingly, as shown in FIG. 2 below, a first user equipment (e.g., aneMBB user equipment) or data corresponds to downlink data transmissionon the basis of a scheduling unit in a slot unit or a long time-sectionunit, in which the puncturing can be performed among given downlink datatransmission resources in the embodiment. In addition, a second userequipment (e.g., a URLLC user equipment) or data corresponds to downlinkdata transmission in which some of the downlink resources, which havebeen assigned for the eMBB user equipment or data transmission, arepunctured and used.

The embodiment provides a control information configuration method forindicating to the first user equipment the puncturing of some of thePDSCH transmission resources of the first user equipment for PDSCHtransmission of the second user equipment as shown in FIG. 2 and a radioresource assignment method for transmitting and receiving the same.

In the embodiment, for the convenience of description, in the case wherepuncturing of the ongoing PDSCH transmission resources for any (eMBB)user equipment is performed for latency-critical PDSCH transmission(i.e., for URLLC PDSCH transmission), the signal of a base station forindicating the same to the corresponding (eMBB) user equipment will bereferred to as a dynamic puncturing indication signal, but the presentdisclosure is not limited to the term. According to the scope of theembodiments, the corresponding signal may be referred to as a dynamicpuncturing indication signal, a puncturing indication signal, asuperposition indication signal, or a pre-emption indication signal, ormay be further referred to as any other terms.

Definition of Downlink Control Information (DCI) Format for PuncturingIndication/Pre-Emption Indication

A puncturing indication/pre-emption indication DCI format may be definedfor puncturing indication/pre-emption indication, in addition to a DCIformat used for transmitting scheduling control information for resourceassignment used for PDSCH/PUSCH transmission/reception {e.g., a downlink(DL) assignment DCI format and an uplink (UL) grant DCI format}, but thepresent disclosure is not limited to the terms.

As to the example shown in FIG. 2, the puncturing indication/pre-emptionindication DCI format is intended to indicate to first user equipmentinformation on the radio resources punctured (or superposed) for thesecond PDSCH transmission of the second user equipment from the firstPDSCH transmission resources assigned to the first user equipment.Detailed embodiments for configuring the DCI format, which are proposedin the present disclosure, will be described below.

Embodiment 1

Puncturing indication/pre-emption indication information may be definedas being UE-specific signalling. When applying dynamic resource sharingbetween a first user equipment and a second user equipment, it ispossible to perform configuration such that only puncturing for at mostone mini-slot level (or a continuous symbol level) is allowed withrespect to a single PDSCH transmission, which is transmitted in a unitof a slot or slots.

That is, as shown in FIG. 2, definition may be made such that puncturingis allowed for only at most one second PDSCH transmission in the firstPDSCH region. In this case, the DCI format for the correspondingpuncturing indication/pre-emption indication may be defined to includeinformation such as a mini-slot index, a symbol index, or a startingsymbol index for indication of the punctured time-section resources andthe number of symbols constituting the time-section resources (e.g.,starting symbol index+symbol duration).

The length of a mini-slot (i.e., the number of symbols constituting themini-slot), which is a unit of puncturing, a mini-slot boundaryconstituting a single DL (centric) slot, and the number thereof may bedetermined i) through UE-specific/cell-specific higher layer signallingfor respective user equipments, ii) dynamically through a puncturingindication/pre-emption indication signal, or iii) implicitly by asubcarrier spacing (SCS) value set in the corresponding userequipment/cell/slot.

The puncturing indication/pre-emption indication information may includeindication information on punctured physical resource blocks (PRBs) inthe punctured mini-slot. At this time, the information indicating thepunctured PRBs may be defined to i) be signalled in the manner indicatedthrough a bitmap in a unit of a PRB group including assigned PRBs or aplurality of localized or distributed PRBs, or ii) reuse PRB assignmentinformation included in second PDSCH scheduling control information(i.e., a DL assignment DCI format for the second PDSCH of the seconduser equipment).

The puncturing indication/pre-emption indication information may bedefined to include a transmission/pre-emption/puncturing type. However,the present disclosure is not limited to the term above. Thetransmission/pre-emption/puncturing type may be defined as being aninformation region indicating whether the second PDSCH transmission isperformed based on puncturing of the first PDSCH or is performed bymeans of superposition in the radio resources.

The puncturing indication/pre-emption indication information may furtherinclude information on whether to retransmit the first PDSCHcorresponding to the punctured or superposed radio resource regions orall of the first PDSCHs and information on reconfiguration of the PUCCHfor HARQ ACK/NACK feedback of the first user equipment.

Embodiment 2

Puncturing indication/pre-emption indication information may be definedas being UE-specific signalling. Definition may be made such thatpuncturing for PDSCH transmission for a plurality of user equipments orfor a plurality of PDSCH transmissions is allowed in the first PDSCHtransmission for a first user equipment in which PDSCH resourceassignment has been performed in a unit of a slot or slots. That is,definition may be made such that puncturing for a plurality of PDSCHtransmissions, such as a second PDSCH, a third PDSCH, a fourth PDSCH,and the like, is allowed in the first PDSCH region by a basestation/network/cell, as shown in FIG. 3.

In this case, signalling of the puncturing indication/pre-emptionindication information may be configured to be performed for the secondPDSCH, the third PDSCH, and the fourth PDSCH, respectively, throughseparate puncturing indication/pre-emption indication DCI.

More specifically, a single puncturing indication/pre-emption indicationDCI format may be defined to indicate puncturing or pre-emptioninformation through a single PDSCH transmission as shown in the firstembodiment, and when puncturing is performed by means of a plurality ofPDSCHs, a plurality of pieces of puncturing indication/pre-emptionindication DCI corresponding to the number of PDSCHs is separatelyconfigured to then be transmitted to the first user equipment.

As an alternative method for puncturing indication/pre-emptionindication when multiple puncturing is supported, the puncturing by aplurality of PDSCHs may be configured to be simultaneously indicatedthrough a single puncturing indication/pre-emption indication DCIformat. In this case, the puncturing indication/pre-emption indicationDCI format may include an information region indicating the number ofpunctured mini-slots or the number of PDSCHs that are punctured andtransmitted within a corresponding PDSCH TTI.

Since puncturing is performed for three mini-slots or three PDSCHtransmissions in the first PDSCH transmission TTI m FIG. 3, aninformation region for indicating the same may be defined in thecorresponding puncturing indication/pre-emption indication DCI format.

Alternatively, definition may be made such that a bitmap is configuredin a unit of a mini-slot (or in a unit of a symbol or a symbol group)constituting the PDSCH transmission TTI and then the puncturing isindicated in a bitmap manner in the respective mini-slots (or symbols orsymbol groups).

Alternatively, the number of punctured mini-slots or the number ofPDSCHs that are punctured and transmitted may be configured to beimplicitly indicated using an aggregation level of the puncturingindication/pre-emption indication DCI {i.e., a function includingparameters such as the amount of radio resource used for transmission ofthe puncturing indication/pre-emption indication DCI, the number ofcontrol channel elements (CCEs), or a search space (SS) through whichthe puncturing indication/pre-emption indication DCI is transmittedaccording thereto}.

In addition, PRB assignment information in the mini-slot, thetransmission/pre-emption/puncturing type, information on whether toperform retransmission, PUCCH reconfiguration information for HARQACK/NACK feedback of the first user equipment, and the like may betransmitted in the same manner as in the first embodiment describedabove.

However, in the first and second embodiments described above, an RNTIvalue of a user equipment (UE) for monitoring the puncturingindication/pre-emption indication DCI may be equal to a UE-specific RNTIvalue assigned for scheduling DCI format monitoring of the userequipment, or a separate UE-specific RNTI for monitoring DCI indicatingpuncturing may be assigned through higher layer signalling.

Embodiment 3

Puncturing indication/pre-emption indication information may be sentthrough cell-specific or TIT/slot/multi-slot-specific transmission.

More specifically, PDSCH transmission resource assignment information ofthe URLLC that has influenced the PDSCH of the eMBB in a unit of acell/slot/multi-slot may be defined to be transmitted through UE-groupcommon (may also be expressed as group-common) control signalling. Thatis, the puncturing indication/pre-emption indication DCI format may besent through slot-specific or UE-group-specific transmission. Thepuncturing indication/pre-emption indication DCI format may includeinformation indicating the PDSCH transmission resource of the URLLC,which has influenced the PDSCH of the eMBB in the corresponding slot(that is, the PDSCH transmission resource punctured and transmitted fromthe eMBB PDSCH resources).

To this end, a separate UE-group-specific RNTI or acell-specific/slot-specific RNTI may be defined for monitoring thepuncturing indication/pre-emption indication information. The RNTI maybe assigned to each UE-group throughUE-specific/cell-specific/UE-group-specific higher layer signalling. Or,the RNTI, may be implicitly defined as a function of a slot index, acell ID, or the like.

A detailed method of configuring an information region of thecell-specific or TTI/slot/multi-slot-specific puncturing indication DCIformat may be conducted according to the first embodiment and the secondembodiment described above.

That is, considering the case in which DCI of a UE-group common forpuncturing indication/pre-emption indication is configured and thecorresponding DCI is transmitted by a base station/network throughUE-group common PDCCH, indication information for punctured/pre-emptedradio resources, which is transmitted through the puncturingindication/pre-emption indication DCI, may include time-section resourceindication information or frequency-section resource indicationinformation, respectively. In addition, the time-section resourceindication information and the frequency-section resource indicationinformation may be configured according to the description of the firstor second embodiment.

As a specific example of this, a pre-emption window and a pre-emptioninterval may be defined to configure information indicating thepunctured or pre-empted time-section resource, but the presentdisclosure is not limited to specific terms.

The pre-emption window may be determined by a transmission period of thepuncturing indication/pre-emption indication DCI or a period of acontrol resource set (CORESET) for the puncturing indication/pre-emptionindication DCI transmission.

For example, the case is considered, in which the puncturingindication/pre-emption indication DCI for notifying ofpuncturing/pre-emption is transmitted in a period of a TTI of the firstuser equipment having a long time-section scheduling unit and a CORESETfor the same is defined, as shown in FIG. 2 or FIG. 3. At this time, theTTI of the first user equipment may be defined as a pre-emption window.

Alternatively, when a signal indicating pre-emption is transmitted in aunit of a plurality of first PDSCH TTIs, a pre-emption window may bedefined in a unit of the plurality of first PDSCH TTIs according to atransmission/reception period of the puncturing indication/pre-emptionindication DCI.

The pre-emption interval may be determined by a time-section schedulingunit used for assigning the resources of the second PDSCH, the thirdPDSCH, and the fourth PDSCH, which perform pre-emption-based PDSCHtransmission/reception by puncturing some of the first PDSCHtransmission resources.

That is, the pre-emption interval may be determined in a unit of a TTIfor PDSCH transmission/reception of the second user equipment, the thirduser equipment, or the fourth user equipment described above.Accordingly, when configuring monitoring configuration information forthe puncturing indication/pre-emption indication DCI of a user equipment(e.g., the first user equipment), in addition thereto, the basestation/network may directly configure information on the pre-emptionwindow and may transmit the same to the user equipment through higherlayer signalling.

Alternatively, it is possible to perform configuration such that thebase station/network transmits, to the user equipment through higherlayer signalling, information for setting a CORESET period formonitoring puncturing indication/pre-emption indication DCI for a userequipment (e.g., the first user equipment) and the user equipment infersinformation on the pre-emption window based on the same.

In addition, configuration information for the pre-emption interval, asdescribed in the first embodiment above, may be i) configured throughhigher layer signalling from the base station/network, ii) dynamicallyindicated through puncturing indication/pre-emption indication DCI, oriii) implicitly configured using a subcarrier spacing (SCS) value usedfor the puncturing indication/pre-emption indication DCI transmission orPDSCH transmission (e.g., the second PDSCH, the third PDSCH, and thefourth PDSCH) in which pre-emption-based resource assignment has beenperformed.

When a pre-emption interval, which is a time-section unit of pre-emptionin the pre-emption window, is defined as described above, the puncturingindication/pre-emption indication DCI, as described in the first orsecond embodiment, may be defined i) to directly indicate an index for apre-emption interval in which pre-emption occurs in the pre-emptionwindow or ii) to indicate a pre-emption interval in which pre-emptionoccurs based on a bitmap.

When directly indicating an index for a pre-emption interval, one pieceof UE-group common puncturing indication/pre-emption indication DCI maybe defined to include information indicating pre-emption for only onepre-emption interval. If pre-emption occurs in a plurality ofpre-emption intervals in the pre-emption window, UE-group commonpuncturing indication/pre-emption indication DCI may be separatelyconfigured and transmitted for the respective pre-emption intervals.

In addition, when the puncturing indication/pre-emption indication DCIincludes bitmap-based pre-emption interval indication information, aplurality of pre-emption intervals, in which pre-emption occurs in thepre-emption window, may be indicated through one piece of puncturingindication/pre-emption indication DCI.

In the case described above, an information region may be separatelydefined to indicate frequency-section resources in which pre-emptionoccurs for the respective pre-emption intervals. The information regionmay be included in the puncturing indication/pre-emption indication DCI.

As a method for configuring information indicating frequency-sectionresources for the radio resources in which pre-emption has occurredthrough the UE-group common puncturing indication/pre-emption indicationDCI, information indicating the frequency-section resources may be RB(Resource Block) or RBG (Resource Block Group)-based bitmap indicationinformation as described in the first embodiment.

It is possible to perform configuration such that a bandwidth part thatis a target of RBG or RB indication information (e.g., a UE-group commonbandwidth part for pre-emption), in which puncturing or pre-emption hasoccurred through puncturing indication/pre-emption indication DCI, isconfigured by a base station/network and is transmitted, through higherlayer signalling, to the user equipment that monitors pre-emptionindication information. In addition, the RB or RBG indicationinformation transmitted through the puncturing indication/pre-emptionindication DCI is indication information for RBs or RBGs constituting abandwidth part for pre-emption, which may be configured by the basestation and may be interpreted by the user equipment.

Alternatively, configuration may be performed such that a plurality ofbandwidth parts for pre-emption are set by the base station andindication information on a bandwidth part in which pre-emption occursand RB or RBG indication information in the corresponding bandwidth partis transmitted through frequency-section resource indication informationof the puncturing indication/pre-emption indication DCI.

In this case, a subcarrier spacing (SCS) value for defining RB gridsconstituting a bandwidth part for pre-emption may be defined i) to beconfigured by a base station/network and to be transmitted via higherlayer signalling, ii) to be dynamically indicated through puncturingindication/pre-emption indication DCI, or iii) to be explicitly orimplicitly configured by subcarrier spacing (SCS) values fortransmission of PDSCHs (e.g., the second PDSCH, the third PDSCH, and thefourth PDSCH) in which the puncturing indication/pre-emption indicationDCI or pre-emption-based resource assignment has been performed.

Alternatively, instead of configuring a separate bandwidth part forpre-emption, it is possible to perform configuration such that RB or RBGindication information, in which pre-emption has occurred with respectto frequency resources constituting the entire band of a correspondingNR component carrier (CC), is configured and transmitted by means of thepuncturing indication/pre-emption indication DCI, and such that the userequipment interprets the RB or RBG indication information based on aUE-common RB grid defined on the basis of the entire band of the NRcomponent carrier (CC).

In this case, a subcarrier spacing (SCS) value defining the UE-common RBgrid may also be defined i) to be configured by a base station/networkand to be transmitted via higher layer signalling, ii) to be dynamicallyindicated through puncturing indication/pre-emption indication DCI, oriii) to be explicitly or implicitly configured by subcarrier spacing(SCS) values for transmission of PDSCHs (e.g., the second PDSCH, thethird PDSCH, and the fourth PDSCH) in which the puncturingindication/pre-emption indication DCI or pre-emption-based resourceassignment has been performed.

Additionally, when information indicating frequency-section resources isconfigured in an RBG unit, the size of the RBG may be i) configuredthrough higher layer signaling from a base station/network, ii)dynamically indicated through puncturing indication/pre-emptionindication DCI, or iii) implicitly defined by subcarrier spacing (SCS)values for transmission of PDSCHs (e.g., the second PDSCH, the thirdPDSCH, and the fourth PDSCH), in which the puncturingindication/pre-emption indication DCI or pre-emption-based resourceassignment has been performed, a bandwidth of the bandwidth part forpre-emption, or a bandwidth of an NR component carrier (CC).

Embodiment 4 Definition of User Equipment (UE) Capability

When defining user equipment (UE) capability for any NR user equipment(particularly, when defining downlink data reception capability of theuser equipment), it is possible to define whether to supportpuncturing-based (or superposition-based) dynamic resource sharing fordownlink data transmission of another time-critical user equipment withrespect to the NR PDSCH resources assigned for the corresponding userequipment.

Alternatively, it is possible to consider the case where some radioresources are punctured from among the radio resources, through whichPDSCH transmission for a certain user equipment is in progress, fortime-critical PDSCH transmission in an NR cell/base station or the casewhere time-critical PDSCH transmission signals are additionallytransmitted using superposition onto some of the radio resources. Atthis time, it is possible to define whether to support explicitpuncturing indication signalling to notify the corresponding userequipment of the same, demodulation and decoding based on PDSCHreception excluding resources pre-empted for the time-critical datatransmission based on explicit puncturing indication information, andfast recovery capability based on the same.

Embodiment 5 Dynamic Puncturing Mode Configuration Method 1 ExplicitSignalling-Based Configuration Method

When assigning downlink data channel resources to a user equipment in acorresponding cell, an NR base station/cell/TRP may determine whether ornot to support dynamic puncturing for some resources (in a unit of amini-slot, a symbol, or some time/frequency resources) within a TTIdefined (or configured) for the corresponding user equipment, and maytransmit the same to the corresponding user equipment throughUE-specific, cell-specific, or UE-group-specific higher-layersignalling.

When determining whether or not to support the PDSCH transmissionthrough the UE-specific, cell-specific, or UE-group-specifichigher-layer signalling as described above, the corresponding userequipment may monitor control information indicating dynamic puncturingfor the PDSCH transmission resources through downlink control channel ina TTI, in which the PDSCH reception is in progress, or in a TTIsubsequent thereto according to the explicit signalling method forindicating dynamic puncturing.

As an alternative method, when assigning downlink data channel resourcesto a user equipment in a cell, an NR base station/cell/transmitting andreceiving point (TRP) may determine whether or not to support dynamicpuncturing for some resources (in a unit of a mini-slot, a symbol, orsome time/frequency resources) within a TTI defined (or configured) forthe corresponding user equipment, and may transmit the same to thecorresponding user equipment through L1/L2 control signalling.

That is, when transmitting downlink data scheduling control informationfor a certain user equipment {that is, transmitting downlink (DL)assignment downlink control information (DCI)} through an NR PDCCH,which is an L1 control channel, it is possible to perform configurationsuch that the DCI includes resource assignment information on the PDSCHand configuration information on whether or not to support dynamicpuncturing for URLLC user equipment data transmission during the ongoingtransmission for the PDSCH.

When it is determined whether or not to support dynamic puncturing foreach PDSCH transmission through the DL assignment DCI as describedabove, the user equipment may perform monitoring to receive controlinformation indicating the dynamic puncturing for the PDSCH transmissionresources through downlink control channel in a TTI, in which the PDSCHreception is in progress, or in a TTI subsequent thereto according tothe explicit signalling method for indicating dynamic puncturing.

As another method, it may be determined whether to support the dynamicpuncturing by means of a combination of the above-described higher-layersignalling and L1/L2 control signalling. That is, an NR basestation/cell/transmitting and receiving point (TRP) may preferentiallyconfigure whether to support dynamic puncturing for a user equipment inthe corresponding cell through UE-specific, cell-specific, orUE-group-specific higher-layer signalling.

When the support of a dynamic puncturing mode is configured for any userequipment through the higher-layer signalling as described above, an NRbase station/cell/transmitting and receiving point (TRP), when assigningPDSCH transmission resources for the corresponding user equipment, mayadditionally include configuration information on the dynamic puncturingin a PDSCH transmission/reception TTI assigned through the DL assignmentDCI, and may transmit the same to the user equipment.

In other words, a user equipment that is set to be in a dynamicpuncturing mode through the higher-layer signalling may be configured toperform monitoring for a DL assignment DCI format including dynamicpuncturing support configuration information in the PDSCH reception TTIand to determine whether or not dynamic puncturing for the PDSCH occursaccording to the dynamic puncturing support configuration information inthe DL assignment DCI format.

As described above, when it is determined whether or not to supportdynamic puncturing for the PDSCH transmission through the UE-specific,cell-specific, or UE-group-specific higher-layer signalling and the DLassignment DCI, the user equipment may monitor control informationindicating dynamic puncturing for the PDSCH transmission resourcesthrough downlink control channel in a TTI, in which the PDSCH receptionis in progress, or in a TTI subsequent thereto according to the explicitsignalling method for indicating dynamic puncturing.

With regard to the dynamic puncturing mode configuration methoddescribed above, the dynamic puncturing mode configuration by the methodmay be interpreted as configuring whether or not to monitor explicitsignalling for indicating the dynamic puncturing in a TTI or a TTIsubsequent thereto.

That is, as described above, it is possible i) to configure whether ornot to monitor the dynamic puncturing indication signal or pre-emptionindication signal through UE-specific, cell-specific, orUE-group-specific higher-layer signalling, ii) to configure whether ornot to monitor the dynamic puncturing indication signal or pre-emptionindication signal through L1 control signalling, or iii) to configurewhether or not to monitor the dynamic puncturing indication signal orpre-emption indication signal through a combination of the UE-specific,cell-specific, or UE-group-specific higher-layer signalling and the L1control signalling.

When the monitoring for the dynamic puncturing indication signal orpre-emption indication signal is configured for any user equipmentaccording to the above-described method, a monitoring time for thepre-emption indication signal may be further configured.

For example, a transmission time or a transmission period of thepre-emption indication signals for the PDSCH transmitted through theslot or aggregated slots may be configured implicitly or throughUE-specific, cell-specific, or UE-group-specific higher-layersignalling, for each slot or each set of aggregated slots, by a basestation.

For example, a constant timing gap (e.g., K slots, where K is aninteger) may be defined between a PDSCH transmission slot and apre-emption indication signal through each slot or aggregated slots.

As described above, consideration is given to the case whereconfiguration information, which is related to a transmission timing ofthe pre-emption indication signal, such as a transmission time or periodof the pre-emption indication signal, is configured by a base station oris defined implicitly. In this case, the user equipment configured tomonitor the pre-emption indication signal may be defined to performmonitoring for the pre-emption indication signal only for thepre-emption indication signal transmission time corresponding to theslot or aggregated slots, in which PDSCH transmission is actuallyperformed for the user equipment, or a control resource set (CORESET) ora search space for the pre-emption indication signal defined at thecorresponding time, regardless of configuration of a transmission timeof the pre-emption indication signal for each slot or each set ofaggregated slots.

That is, when a base station/network configures a user equipment tomonitor signals of puncturing indication or pre-emption indication, thebase station/network configures a CORESET for monitoring the puncturingindication or pre-emption indication and transmits the same to the userequipment through UE-specific, cell-specific, or UE-group-specifichigher-layer signalling.

For example, puncturing indication information or pre-emption indicationinformation may be configured by means of group-common DCI to then betransmitted to the user equipment through the PDCCH. In this case,control information on a CORESET for monitoring group-common pre-emptionindication DCI (that is, a group-common CORESET for pre-emptionindication) (however, the embodiment is not limited to the terms) may betransmitted to the respective user equipments by the basestation/network through higher-layer signalling.

The group-common CORESETs for pre-emption indication described above maybe defined to have a one-to-one correspondence relationship with thepre-emption regions as shown in FIG. 4.

Referring to FIG. 4, a group-common CORESET #1 for pre-emptionindication may be transmitted to a user equipment at every 3 slots, andeach CORESET may correspond to a pre-emption region including threeslots just before the slot to which the CORESET belongs.

On the other hand, a group-common CORESET #2 for pre-emption indicationmay be transmitted to a user equipment at every slot, and each CORESETmay correspond to a pre-emption region including one slot just beforethe slot to which the CORESET belongs.

In this case, a bandwidth part (BP) of the group-common CORESET #1 forpre-emption indication and a bandwidth part (BP) of the group-commonCORESET #2 for pre-emption indication may be included in the bandwidthof an NR component carrier (CC), and may be different from each other.

Accordingly, pre-emption indication DCI transmitted through agroup-common CORESET for pre-emption indication configured in a slot maybe defined to indicate time/frequency radio resource information on theoccurrence of puncturing or pre-emption in the pre-emption region.

To this end, configuration information for the group-common CORESET forpre-emption indication may be defined to include time/frequency-sectionconfiguration information for configuring the pre-emption regioncorresponding to the group-common CORESET for pre-emption indication, aswell as time/frequency resource assignment information on theconfiguration of the CORESET in a slot (that is, symbol assignmentinformation and PRB assignment information for the configuration of theCORESET).

For example, the time-section configuration information for theconfiguration of the pre-emption region may be defined to be determinedby period configuration information of the group-common CORESET forpre-emption indication.

When a period of the group-common CORESET for pre-emption indication isset to K, the group-common CORESETs for pre-emption indication areconfigured at every K slots. Accordingly, the pre-emption regioncorresponding to the group-common CORESET for pre-emption indication,which is configured in a slot #n, may be defined to be configured bymeans of K slots #(n−K) to #(n−1) or K slots #(n−K+1) to #n on the timeaxis.

The user equipment, which has received pre-emption indicationinformation transmitted through the group-common CORESET configured in aslot #n, may perform configuration such that the pre-emption region forthe pre-emption indication includes of a set of symbols constituting Kslots preceding the same (i.e., a set of 14K symbols preceding the firstsymbol constituting the corresponding group-common CORESET). At thistime, the value of K may be indicated to the user equipment throughUE-specific, cell-specific, or UE-group-specific higher-layer signalling(e.g., RRC signalling).

In addition, when configuring a group-common CORESET for pre-emptionindication for frequency-section configuration for the configuration ofa pre-emption region, bandwidth part configuration information of thepre-emption region corresponding to the group-common CORESET forpre-emption indication may be defined as being included. For example,bandwidth part configuration information for frequency-sectionconfiguration of a pre-emption region may be defined to be determined byan active bandwidth part of the user equipment in a manner similar tothe above-described time-section configuration information.

As described above, the configuration information on the group-commonCORESET for pre-emption indication may include time/frequency resourceconfiguration information on the configuration of the CORESET, andpre-emption indication DCI transmitted implicitly or explicitly throughthe group-common CORESET for pre-emption indication may be defined toinclude configuration information on the pre-emption region indicatingthe radio resources, which have been punctured or pre-empted.

In addition, the configuration information on the group-common CORESETfor pre-emption indication may include RNTI configuration informationfor monitoring the pre-emption indication DCI in the CORESET.

Further, one or more group-common CORESETs for pre-emption indicationmay be configured for a user equipment monitoring the pre-emptionindication. In this case, the user equipment may be configured toperform monitoring for pre-emption indication DCI in the CORESET onlywhen PDSCH resource assignment is performed with respect to one or moreCORESETs, which have been configured according to the configurationinformation on the group-common CORESET for pre-emption indicationdescribed above, to overlap all or a part of the pre-emption regioncorresponding to each CORESET.

With regard to a method for a user equipment, which is configured tomonitor the pre-emption indication information, to monitor a CORESET inorder to receive pre-emption indication DCI according to configurationinformation on the group-common CORESET for pre-emption indication, evenif the CORESET for pre-emption indication is configured in any slot,when PDSCH resources overlapping all or a part of the pre-emption regioncorresponding to the CORESET are not assigned or PDSCH reception is notperformed according thereto, the user equipment may be configured not toperform monitoring for receiving the pre-emption indication DCI for theCORESET of the corresponding slot.

Additionally, in the case where there are one or more TTIs configuredfor a user equipment set to be in a dynamic puncturing mode inEmbodiment 4 and Embodiment 5 described above, whether to apply dynamicpuncturing may be determined using a function of the TTI to which aPDSCH is assigned.

For example, it is possible to make a configuration such that athreshold value is defined for a PDSCH transmission/reception TTI andthe dynamic puncturing is supported, depending on whether a dynamicpuncturing mode is configured, only for the user equipment or PDSCHtransmission/reception to which a TTI exceeding the threshold value isset. On the other hand, the user equipment or PDSCHtransmission/reception, for which a TTI less than the threshold value isset, may be configured such that the dynamic puncturing mode is notconfigured for the same or such that the dynamic puncturing is notsupported for the same regardless of the configuration of the dynamicpuncturing mode.

The threshold value may be set by a base station, or the threshold valuemay be any constant value. In addition, the threshold value may bedefined in an absolute time unit (e.g. X ms, where X is a positivenumber), or may be defined in a unit of a symbol constituting a TTI foreach subcarrier spacing (SCS) (e.g., X OFDM symbols for 15 kHz SCS, YOFDM symbols for 30 kHz SCS, or the like).

FIG. 5 is a flowchart illustrating a procedure of a user equipment forreceiving downlink pre-emption indication information in the embodiment.

Referring to FIG. 5, the user equipment may receive monitoringconfiguration information for downlink pre-emption indicationinformation from a base station (S500). The monitoring configurationinformation may include information on whether to monitor the downlinkpre-emption indication, and the monitoring configuration information maybe transmitted to the user equipment through UE-specific, cell-specific,or UE-group-specific higher-layer signalling (e.g., RRC signalling) asdescribed in Embodiment 5 above.

That is, the monitoring configuration information may includeinformation on whether the user equipment must monitor downlinkpre-emption indication information, which is used to indicate whetherdownlink pre-emption has occurred. For example, an eMBB user equipmentis required to monitor the downlink pre-emption indication informationbecause the resources that have already been assigned to the eMBB userequipment are likely to be pre-empted by an URLLC user equipment.However, an URLLC user equipment may not be required to monitor thedownlink pre-emption indication information because the resources thathave already been assigned to the URLLC user equipment are unlikely tobe pre-empted by another user equipments.

Next, the user equipment may receive configuration information on aCORESET for receiving downlink pre-emption indication information fromthe base station (S510).

Subsequently, the user equipment may configure reference downlinkresources based on the configuration information on the CORESET, whichhas been received in Step S510 (S520).

Here, the reference downlink resources denote target resources to bepre-empted and denote resources expressed as pre-emption regions in theabove-described Embodiment 5.

At this time, a time section of the reference downlink resources may bedetermined according to a period for monitoring a CORESET that mayinclude information indicating the pre-emption as described above. Forexample, as described in the Embodiment 5, when the time section of thereference downlink resources has K slots, the value of K may match amonitoring period for a CORESET that may include information indicatingthe pre-emption. In addition, a frequency section of the referencedownlink resources may be determined by an active bandwidth part of theuser equipment.

Then, the user equipment may monitor downlink pre-emption indicationinformation for the reference downlink resources (S530).

At this time, the downlink pre-emption indication information may beindicated through group-common DCI. The group-common DCI may betransmitted to the user equipment through a downlink control channel(PDCCH), which may be transmitted through a group-common CORESET forpre-emption indication described in the Embodiment 5.

In the case where the user equipment monitors a CORESET that may includeinformation indicating pre-emption in order to receive downlinkpre-emption indication information, the user equipment may monitor thedownlink pre-emption indication information only when the time section,in which the downlink data channel (PDSCH) is assigned to the userequipment, overlaps all or a part of the reference downlink resources asdescribed in the Embodiment 5.

That is, if there is no downlink data channel (PDSCH) assigned to theuser equipment among the resources in the reference downlink resources,the user equipment does not need to check the downlink pre-emptionbecause there is no target resource to be pre-empted. Thus, in thiscase, the user equipment may not perform monitoring for the downlinkpre-emption indication information.

The downlink pre-emption indication information may include a bitmapindicating information on time-section resources or frequency-sectionresources in which pre-emption has occurred, among reference downlinkresources.

Here, the reference downlink resources are target resource to bepre-empted. That is, pre-emption may occur in some region of thereference downlink resources, and the user equipment may determine theregion where pre-emption has occurred in the reference downlinkresources using the bitmap described above.

In this case, a time section of the reference downlink resources may beset by means of the pre-emption window described in the Embodiment 3,and a frequency section thereof may be set by means of the bandwidthpart described in the Embodiment 3.

For example, the above-described bitmap may include 14 bits, wherein abit of the bitmap may indicate one of M different time-section resourcesand may indicate one of N different frequency-section resources. Here, Mand N denote natural numbers of 1 or more.

In this case, (M*N) different resources may be determined by M differenttime-section resources and N different frequency-section resources, andthe respective resources must be mapped with different bits of thebitmap to distinguish between the resources. Therefore, it is possibleto set two cases, where M=14 and N=1 and where M=7 and N=2, among thepairs of natural numbers M*N, which satisfy (M*N)=14.

Then, the user equipment may receive information, which is indicationinformation among the downlink pre-emption indication information, forsetting a unit of a time-section resource and a unit of afrequency-section resource, in which pre-emption has occurred, from thebase station through higher layer signalling. The unit of thetime-section resource may be represented by the pre-emption intervaldescribed in the third embodiment, and the unit of the frequency-sectionresource may be expressed by one or more RBs or RBGs described in thethird embodiment.

For example, the user equipment may receive, from the base station,information on whether M and N correspond to M=14 and N=1 or M=7 and N=2through the higher layer signalling such as an RRC. Then, the userequipment may set, as a time-section resource unit, a value obtained bydividing the total time-section resources of the reference downlinkresources by M, and the user equipment may set, as a frequency-sectionresource unit, a value obtained by dividing the total time-sectionresources of the reference downlink resources by N. At this time, thecase where M and N have values may be expressed using a 1-bit indicatorbecause M and N have values according to one of two cases.

For another example, the user equipment may receive informationexplicitly indicating the number of symbols constituting thetime-section resource unit or the number of RBs (or RBGs) constitutingthe frequency-section resource unit from the base station through higherlayer signalling such as an RRC.

In this case, the time-section resource unit and the frequency-sectionresource unit indicated by a bit of the bitmap may be constant for allof the bits of the bitmap, or may be implicitly determined by means of afunction of an index of the time-section resource (e.g., a slot index)and an index of the frequency-section resource (e.g., an RB index)indicated by a bit.

For example, in the case where the total time-section resources of thereference downlink resources include T symbols when M=14 and N=1, thetime-section resource unit indicated by the first T−(┌T/14┐×14) bits,among 14 bits constituting the bitmap, may be ┌T/14┐ symbols, and thetime-section resource unit indicated by the remaining 14−T+(┌T/14┐×14)bits may be ┌T/14┐ symbols.

Another example may be configured such that the total time-sectionresources of the reference downlink resources include T symbols when M=7and N=2, the total frequency-section resources of the reference downlinkresources include B PRBs, and 14 bits constituting a bitmap may beconfigured with 7 pairs of bits. In this case, the time-section resourceunit indicated by the first T−(┌T/7┐×7) bits, among 7 pairs of bitsconstituting the bitmap, may be ┌T/7┐ symbols, and the time-sectionresource unit indicated by the remaining 7−T+(┌T/7┐×7) bits may be └T/7┘symbols. In addition, the frequency-section resource unit indicated bythe first bit, among the pairs described above, may be ┌B/2┐ PRBs, andthe frequency-section resource unit indicated by the second bit may be┌B/2┐ PRBs.

FIG. 6 is a flowchart illustrating a procedure of a base station fortransmitting downlink pre-emption indication information in theembodiment.

Referring to FIG. 6, the base station may configure monitoringconfiguration information for downlink pre-emption indicationinformation (S600). At this time, the monitoring configurationinformation may include information on whether to monitor the downlinkpre-emption indication as described with reference to FIG. 5, and themonitoring configuring information may be transmitted to a userequipment through UE-specific, cell-specific, or UE-group-specifichigher-layer signalling as described in Embodiment 5.

Next, the base station may transmit, to the user equipment,configuration information on a CORESET for transmitting downlinkpre-emption indication information (S610). At this time, the downlinkpre-emption indication information may be transmitted to the userequipment through group-common DCI. The group-common DCI may betransmitted to the user equipment through a downlink control channel(PDCCH), which may be transmitted through a group-common CORESET forpre-emption indication described in the Embodiment 5.

Therefore, the user equipment, which has received the configurationinformation for the CORESET from the base station, may monitor theCORESET to thus identify the downlink pre-emption indicationinformation.

In addition, the base station may transmit downlink pre-emptionindication information for the reference downlink resources to the userequipment (S620).

Here, the reference downlink resource refers to a target resource to bepre-empted and refers to a resource expressed as a pre-emption region inthe above-described Embodiment 5.

At this time, a time section of the reference downlink resources may bedetermined according to a period for monitoring a CORESET that mayinclude information indicating the pre-emption as described above. Forexample, as described in the Embodiment 5, when the time section of thereference downlink resources has K slots, the value of K may match amonitoring period for a CORESET that may include information indicatingpre-emption. In addition, a frequency section of the reference downlinkresources may be determined by an active bandwidth part of the userequipment.

The downlink pre-emption indication information may include a bitmapindicating information on time-section resources or frequency-sectionresources in which pre-emption has occurred, from the reference downlinkresources.

Here, the reference downlink resources are target resources to bepre-empted. That is, pre-emption may occur in some region of thereference downlink resources, and the base station may transmit, to theuser equipment, information on the region where the pre-emption hasoccurred, among the reference downlink resources, using the bitmapdescribed above.

In this case, a time section of the reference downlink resources may beset by means of the pre-emption window described in the Embodiment 3,and a frequency section thereof may be set by means of the bandwidthpart described in the Embodiment 3.

For example, the above-described bitmap may include 14 bits, wherein abit of the bitmap may indicate one of M different time-section resourcesand may indicate one of N different frequency-section resources. Here, Mand N denote natural numbers of 1 or more, respectively.

In this case, (M*N) different resources may be determined by M differenttime-section resources and N different frequency-section resources, andthe respective resources must be mapped with different bits of thebitmap to distinguish between the resources. Therefore, it is possibleto set two cases, where M=14 and N=1 and where M=7 and N=2, among thepairs of natural numbers M*N, which satisfy (M*N)=14.

Then, the base station may transmit information, which is indicationinformation among the downlink pre-emption indication information, forsetting a unit of a time-section resource and a unit of afrequency-section resource, in which pre-emption has occurred, to userequipment through higher layer signalling. The unit of the time-sectionresource may be represented by the pre-emption interval described in thethird embodiment, and the unit of the frequency-section resource may beexpressed by one or more RBs or RBGs described in the third embodiment.

For example, the base station may transmit, to the user equipment,information on whether M and N correspond to M=14 and N=1 or M=7 and N=2through the higher layer signalling such as an RRC. Then, the userequipment that has received the same may set, as a time-section resourceunit, a value obtained by dividing the total time-section resources ofthe reference downlink resources by M, and may set, as afrequency-section resource unit, a value obtained by dividing the totaltime-section resources of the reference downlink resources by N.

As another example, the base station may transmit information explicitlyindicating the number of symbols constituting the time-section resourceunit or the number of RBs (or RBGs) constituting the frequency-sectionresource unit from to the user equipment through higher layer signallingsuch as an RRC.

FIG. 7 is a block diagram illustrating a base station according to theembodiment.

Referring to FIG. 7, the base station 700 includes a controller 710, atransmitter 720, and a receiver 730.

The controller 710 may configure monitoring configuration informationfor downlink pre-emption indication information. At this time, themonitoring configuration information may include information on whetherto monitor the downlink pre-emption indication information as describedabove. In addition, the information may be transmitted to the userequipment through UE-specific, cell-specific, or UE-group-specifichigher-layer signalling as described in the Embodiment 5.

The transmitter 720 and the receiver 730 are used to transmit andreceive signals, messages, and data necessary for performing the presentdisclosure described above.

More specifically, the transmitter 720 may transmit, to the userequipment, configuration information on a CORESET for transmittingdownlink pre-emption indication information, and the transmitter 720 maytransmit, to the user equipment, downlink pre-emption indicationinformation for reference downlink resources.

At this time, the downlink pre-emption indication information may betransmitted to the user equipment through group-common DCI. Thegroup-common DCI may be transmitted to the user equipment through adownlink control channel (PDCCH), which may be transmitted through agroup-common CORESET for pre-emption indication described in Embodiment5.

Therefore, the user equipment, which has received the configurationinformation for a CORESET from the base station, may monitor the CORESETto thus identify the downlink pre-emption indication information.

Here, the reference downlink resource refers to a target resource to bepre-empted, and the reference downlink resource also refers to a regionexpressed as a pre-emption region in the Embodiment 5 described above.

At this time, a time section of the reference downlink resources may bedetermined according to a period for monitoring a CORESET that mayinclude information indicating the pre-emption as described above. Forexample, as described in the Embodiment 5, when a time section of thereference downlink resources has K slots, the value of K may match amonitoring period for a CORESET that may include information indicatingpre-emption. In addition, a frequency section of the reference downlinkresources may be determined by an active bandwidth part of the userequipment.

In this case, the downlink pre-emption indication information mayinclude a bitmap indicating information on time-section resources orfrequency-section resources in which pre-emption has occurred, among thereference downlink resources, as described with reference to FIG. 5.

For example, the above-described bitmap may include 14 bits, wherein abit of the bitmap may indicate one of M different time-section resourcesand may indicate one of N different frequency-section resources. Here, Mand N denote natural numbers of 1 or more, respectively.

In this case, (M*N) different resources may be determined by M differenttime-section resources and N different frequency-section resources, andthe respective resources must be mapped with different bits of thebitmap to distinguish between the resources. Therefore, it is possibleto set two cases, where M=14 and N=1 and where M=7 and N=2, among thepairs of natural numbers M*N, which satisfy (M*N)=14.

Then, the base station may transmit information, which is indicationinformation among the downlink pre-emption indication information, forsetting a unit of a time-section resource and a unit of afrequency-section resource, in which pre-emption has occurred, to theuser equipment through higher layer signalling. The unit of thetime-section resource may be represented by the pre-emption intervaldescribed in the third embodiment, and the unit of the frequency-sectionresource may be expressed by one or more RBs or RBGs described in thethird embodiment.

For example, the base station may transmit, to the user equipment,information on whether M and N correspond to M=14 and N=1 or M=7 and N=2through the higher layer signalling such as an RRC. Then, the userequipment that has received the same may set, as a time-section resourceunit, a value obtained by dividing the total time-section resources ofthe reference downlink resources by M, and may set, as afrequency-section resource unit, a value obtained by dividing the totaltime-section resources of the reference downlink resources by N.

As another example, the base station may transmit information explicitlyindicating the number of symbols constituting the time-section resourceunit or the number of RBs (or RBGs) constituting the frequency-sectionresource unit to the user equipment through higher layer signalling suchas an RRC.

FIG. 8 is a block diagram illustrating a user equipment according to theembodiment.

Referring to FIG. 8, the user equipment 800 includes a receiver 810, acontroller 820, and a transmitter 830.

The receiver 810 receives, from the base station, downlink controlinformation, data, and messages through a corresponding channel. Morespecifically, the receiver 810 may receive, from the base station,monitoring configuration information for the downlink pre-emptionindication information, and the receiver 810 may receive configurationinformation on a CORESET for receiving the downlink pre-emptionindication information from the base station.

At this time, the monitoring configuration information may includeinformation on whether or not to monitor the downlink pre-emptionindication information as described above, and the monitoringconfiguration information may be transmitted to the user equipmentthrough UE-specific, cell-specific, or UE-group-specific higher-layersignalling as described in Embodiment 5.

The controller 820 may configure reference downlink resources based onthe configuration information on the CORESET, and the controller 820 maymonitor downlink pre-emption indication information for the referencedownlink resources.

Here, the reference downlink resource refers to a target resource to bepre-empted, and the reference downlink resource also refers to aresource expressed as a pre-emption region in the Embodiment 5 describedabove. As described above, a time section of the reference downlinkresources may be determined according to a period for monitoring aCORESET that may include information indicating the pre-emption. Forexample, as described in the Embodiment 5, when the time section of thereference downlink resources has K slots, the value of K may match amonitoring period for a CORESET that may include information indicatingpre-emption. In addition, a frequency section of the reference downlinkresources may be determined by an active bandwidth part of the userequipment.

In addition, the downlink pre-emption indication information may beindicated through group-common DCI. The group-common DCI may betransmitted to the user equipment through a downlink control channel(PDCCH), which may be transmitted through the group-common CORESET forpre-emption indication described in Embodiment 5.

In the case where the user equipment monitors a CORESET that may includeinformation indicating pre-emption for receiving downlink pre-emptionindication information, the user equipment may monitor the downlinkpre-emption indication information only when the time section, in whichthe downlink data channel (PDSCH) is assigned to the user equipment,overlaps all or a part of the reference downlink resources as describedin the Embodiment 5.

That is, if there is no downlink data channel (PDSCH) assigned to theuser equipment among the resources in the reference downlink resources,the user equipment does not need to check the downlink pre-emptionbecause there is no target resource to be pre-empted. Thus, in thiscase, the user equipment may not perform monitoring for the downlinkpre-emption indication information.

The downlink pre-emption indication information may include a bitmapindicating information on time-section resources or frequency-sectionresources in which pre-emption has occurred, among the referencedownlink resources. Here, the reference downlink resources denote targetresources to be pre-empted as described with reference to FIG. 6.

For example, the above-described bitmap may include 14 bits, wherein abit of the bitmap may indicate one of M different time-section resourcesand may indicate one of N different frequency-section resources. Here, Mand N denote natural numbers of 1 or more, respectively.

In this case, (M*N) different resources may be determined by M differenttime-section resources and N different frequency-section resources, andthe respective resources must be mapped with different bits of thebitmap in order to distinguish between the resources. Therefore, it ispossible to set two cases, where M=14 and N=1 and where M=7 and N=2,among the pairs of natural numbers M*N, which satisfy (M*N)=14.

Then, the user equipment may receive information, which is indicationinformation among the downlink pre-emption indication information, forsetting a unit of a time-section resource and a unit of afrequency-section resource, in which pre-emption has occurred, from thebase station through higher layer signalling. The unit of thetime-section resource may be represented by the pre-emption intervaldescribed in the third embodiment, and the unit of the frequency-sectionresource may be expressed by one or more RBs or RBGs described in thethird embodiment.

For example, the user equipment may receive, from the base station,information on whether M and N correspond to M=14 and N=1 or M=7 and N=2through the higher layer signalling such as an RRC, thereby setting, asa time-section resource unit, a value obtained by dividing the totaltime-section resources of the reference downlink resources by M, andsetting, as a frequency-section resource unit, a value obtained bydividing the total time-section resources of the reference downlinkresources by N.

As another example, the user equipment may receive informationexplicitly indicating the number of symbols constituting thetime-section resource unit or the number of RBs (or RBGs) constitutingthe frequency-section resource unit from the base station through higherlayer signalling such as an RRC.

The standard details or standard documents mentioned in the aboveembodiments are omitted for the simplicity of the description of thespecification, and the standard details or standard documents constitutea part of the present specification. Therefore, when a part of thecontents of the standard details and the standard documents is added tothe present specifications or is disclosed in the claims, it should beconstrued as falling within the scope of the present disclosure.

Although a preferred embodiment of the present disclosure has beendescribed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the disclosureas disclosed in the accompanying claims. Therefore, exemplary aspects ofthe present disclosure have not been described for limiting purposes.The scope of the present disclosure shall be construed on the basis ofthe accompanying claims in such a manner that all of the technical ideasincluded within the scope equivalent to the claims belong to the presentdisclosure.

Moreover, the terms “system,” “processor,” “controller,” “component,”“module,” “interface,”, “model,” “unit” or the like are generallyintended to refer to a computer-related entity, either hardware, acombination of hardware and software, software, or software inexecution. For example, a component may be, but is not limited to being,a process running on a processor, a processor, a controller, a controlprocessor, an object, an executable, a thread of execution, a program,and/or a computer. By way of illustration, both an application runningon a controller or processor and the controller or processor can be acomponent. One or more components may reside within a process and/orthread of execution and a component may be localized on one computerand/or distributed between two or more computers.

What is claimed is:
 1. A method for receiving downlink pre-emptionindication information by a user equipment, the method comprising:receiving monitoring configuration information for downlink pre-emptionindication information from a base station; receiving configurationinformation on a control resource set (CORESET) for receiving thedownlink pre-emption indication information from the base station;configuring reference downlink resources for the downlink pre-emptionindication based on the configuration information on a control resourceset (CORESET); and monitoring the downlink pre-emption indicationinformation for the reference downlink resources, wherein the downlinkpre-emption indication information comprises a bitmap indicatinginformation on at least one of time-section resources andfrequency-section resources in which pre-emption has occurred, amongreference downlink resources.
 2. The method of claim 1, wherein thedownlink pre-emption indication information is indicated throughgroup-common downlink control information (DCI).
 3. The method of claim1, wherein the information for setting a unit of time-section resourcesand a unit of frequency-section resources is received from the basestation through higher layer signalling.
 4. The method of claim 1,wherein a time section of the reference downlink resources comprises 14Ksymbols before a first symbol constituting the control resource set(CORESET) when a monitoring period for the control resource set(CORESET) is K.
 5. The method of claim 1, wherein a frequency section ofthe reference downlink resources comprises physical resource blocksconstituting an active bandwidth part.
 6. The method of claim 1, whereinthe bitmap comprises 14 bits.
 7. The method of claim 6, whereinrespective bits of the bitmap indicate one of M different time-sectionresources and indicate one of N different frequency-section resources,where M and N is an integer number.
 8. The method of claim 7, wherein Mand N have values such that M=14 and N=1 or M=7 and N=2.
 9. A method fortransmitting downlink pre-emption indication information by a basestation, the method comprising: configuring monitoring configurationinformation for downlink pre-emption indication information;transmitting, to a user equipment, configuration information on acontrol resource set (CORESET) for transmitting the downlink pre-emptionindication information; and transmitting, to the user equipment, thedownlink pre-emption indication information for reference downlinkresources, wherein the downlink pre-emption indication informationcomprises a bitmap indicating information on at least one oftime-section resources and frequency-section resources in whichpre-emption has occurred, among reference downlink resources.
 10. Themethod of claim 9, wherein the downlink pre-emption indicationinformation is transmitted to the user equipment through group-commonDCI.
 11. The method of claim 9, wherein the information for setting aunit of time-section resources and a unit of frequency-section resourcesis transmitted to the user equipment through higher layer signalling.12. The method of claim 9, wherein a time section of the referencedownlink resources comprises 14K symbols just before a first symbolconstituting the control resource set (CORESET) when a monitoring periodfor the control resource set (CORESET) is K.
 13. The method of claim 9,wherein a frequency section of the reference downlink resourcescomprises physical resource blocks constituting an active bandwidthpart.
 14. The method of claim 9, wherein the bitmap comprises 14 bits.15. The method of claim 14, wherein respective bits of the bitmapindicate one of M different time-section resources and indicate one of Ndifferent frequency-section resources, where M and N is an integernumber.
 16. The method of claim 15, wherein M and N have values suchthat M=14 and N=1 or M=7 and N=2.
 17. A user equipment for receivingdownlink pre-emption indication information, the user equipmentcomprising: a receiver configured to receive monitoring configurationinformation for downlink pre-emption indication information from a basestation, and configured to receive configuration information on acontrol resource set (CORESET) for receiving the downlink pre-emptionindication information from the base station; and a controllerconfigured to configure reference downlink resources for downlinkpre-emption indication based on the configuration information on thecontrol resource set (CORESET), and configured to monitor the downlinkpre-emption indication information for the reference downlink resources,wherein the downlink pre-emption indication information comprises abitmap indicating information on at least one of time-section resourcesand frequency-section resources in which pre-emption has occurred, amongreference downlink resources.
 18. The user equipment of claim 17,wherein the downlink pre-emption indication information is indicatedthrough group-common downlink control information (DCI).
 19. The userequipment of claim 17, wherein the information for setting a unit oftime-section resources and a unit of frequency-section resources isreceived from the base station through higher layer signalling.
 20. Theuser equipment of claim 17, wherein a time section of the referencedownlink resources comprises 14K symbols just before a first symbolconstituting the control resource set (CORESET) when a monitoring periodfor the control resource set (CORESET) is K.